Nationals vs Mariners Live: Game Time, Pitching Matchups, and How to Watch the Must-See Interleague Showdown Tonight

SEATTLE — The Seattle Mariners rode a power surge from catcher Cal Raleigh and a crisp outing from their pitching staff to rout the Washington Nationals 9–1 on Tuesday night at T-Mobile Park, taking the opener of the three-game interleague set and tightening their grip on first place in the American League West. Raleigh, already one of baseball’s hottest hitters, launched two no-doubt homers—his 18th and 19th of the season—to become the first Mariner with at least 19 long balls before June since Ken Griffey Jr. and Alex Rodriguez accomplished the feat in 1998. Julio Rodríguez kept the party going with a blast of his own, giving Seattle back-to-back shots in a four-run fifth inning that blew the game wide open. Nationals top prospect James Wood provided Washington’s lone highlight, drilling a solo homer to straightaway center in the seventh. The rookie’s third big-league round-tripper briefly cut the deficit to 6–1, but Seattle answered with three insurance runs in the bottom half to put matters out of reach. Key numbers • Final score: Mariners 9, Nationals 1 • Attendance: 19,861 • Game time: 2 hours, 18 minutes • Seattle record: 30-23 (1st in AL West) • Washington record: 24-30 (4th in NL East) How Seattle won Raleigh’s multi-homer night accounted for five RBI, and every spot in the Mariners’ order reached base at least once. Seattle’s bullpen—asked to cover the final four frames—faced the minimum after Wood’s homer, retiring nine of the last 10 hitters. What it means The victory is Seattle’s seventh in its last nine games and keeps the club 1½ games clear of Houston, while Washington drops 11 games back of Philadelphia in a crowded NL East. With Cal Raleigh’s slugging pace and a staff that entered the night ranked second in the AL in ERA, the Mariners are positioning themselves as early buyers ahead of the July trade deadline. Up next Game 2 is set for Wednesday (6:40 p.m. PT) with right-hander George Kirby (4-3, 3.28 ERA) scheduled to face Nationals veteran Trevor Williams (3-4, 4.12). Fans in the Pacific Northwest can watch on ROOT Sports NW, while viewers in the D.C. market can tune to MASN 2; the game will also stream on MLB.TV and the Bally Sports app (local blackout rules apply). Search-friendly quick hits • “Nationals vs Mariners score” – Seattle 9, Washington 1 • “Cal Raleigh home run video” – Two bombs, 19th HR before June • “Nationals vs Mariners highlights” – J-Rod & Raleigh go back-to-back, James Wood HR • Next matchup: May 29, 2025, live stream details, starting pitchers With the series now tilting Seattle’s way, Wednesday shapes up as a pivotal contest for a Nationals club looking to steady itself on the road and avoid surrendering early momentum in the Emerald City.